Leonard Susskind, speaking at the Institute for Advanced Study, lays out two toy models that physicists use to test ideas about holography, the proposal that gravity in a volume of space can be described by a theory living on its boundary. One is the double-scaled Sachdev-Ye-Kitaev model taken to its infinite coupling limit, DSSYK-infinity, a solvable quantum system built from randomly coupled fermions that has become a testing ground for holographic dualities. The other is the 't Hooft model, the exactly solvable large-N limit of two-dimensional QCD that 't Hooft worked out in the 1970s. Susskind walks through what each model can and cannot capture about bulk geometry, entropy, and the emergence of a dual gravitational description, treating them as parallel case studies rather than competitors. Delivered to a seminar audience at IAS's Bloomberg Lecture Hall, the talk assumes graduate-level familiarity with quantum field theory and string theory and moves through the technical comparison at a correspondingly fast pace.